getsentry · nicohrubec · Apr 21, 2026 · Apr 21, 2026 · Apr 21, 2026 · Apr 21, 2026
diff --git a/.size-limit.js b/.size-limit.js
@@ -326,7 +326,7 @@ module.exports = [
     path: createCDNPath('bundle.tracing.replay.feedback.min.js'),
     gzip: false,
     brotli: false,
-    limit: '271 KB',
+    limit: '272 KB',
     disablePlugins: ['@size-limit/esbuild'],
   },
   {

diff --git a/dev-packages/browser-integration-tests/suites/public-api/logger/integration/test.ts b/dev-packages/browser-integration-tests/suites/public-api/logger/integration/test.ts
@@ -177,7 +177,7 @@ sentryTest('should capture console object calls', async ({ getLocalTestUrl, page
             'sentry.message.template': { value: 'Mixed: {} {} {} {}', type: 'string' },
             'sentry.message.parameter.0': { value: 'prefix', type: 'string' },
             'sentry.message.parameter.1': { value: '{"obj":true}', type: 'string' },
-            'sentry.message.parameter.2': { value: '[4,5,6]', type: 'string' },
+            'sentry.message.parameter.2': { value: [4, 5, 6], type: 'array' },
             'sentry.message.parameter.3': { value: 'suffix', type: 'string' },
           },
         },

diff --git a/dev-packages/browser-integration-tests/suites/public-api/logger/scopeAttributes/subject.js b/dev-packages/browser-integration-tests/suites/public-api/logger/scopeAttributes/subject.js
@@ -3,7 +3,6 @@ Sentry.logger.info('log_before_any_scope', { log_attr: 'log_attr_1' });
 
 Sentry.getGlobalScope().setAttributes({ global_scope_attr: true });
 
-// this attribute will not be sent for now
 Sentry.getGlobalScope().setAttribute('array_attr', [1, 2, 3]);
 
 // global scope, log attribute

diff --git a/dev-packages/browser-integration-tests/suites/public-api/logger/scopeAttributes/test.ts b/dev-packages/browser-integration-tests/suites/public-api/logger/scopeAttributes/test.ts
@@ -47,6 +47,7 @@ sentryTest('captures logs with scope attributes', async ({ getLocalTestUrl, page
             'sentry.sdk.version': { value: expect.any(String), type: 'string' },
             'sentry.timestamp.sequence': { value: expect.any(Number), type: 'integer' },
             global_scope_attr: { value: true, type: 'boolean' },
+            array_attr: { value: [1, 2, 3], type: 'array' },
             log_attr: { value: 'log_attr_2', type: 'string' },
           },
         },
@@ -61,6 +62,7 @@ sentryTest('captures logs with scope attributes', async ({ getLocalTestUrl, page
             'sentry.sdk.version': { value: expect.any(String), type: 'string' },
             'sentry.timestamp.sequence': { value: expect.any(Number), type: 'integer' },
             global_scope_attr: { value: true, type: 'boolean' },
+            array_attr: { value: [1, 2, 3], type: 'array' },
             isolation_scope_1_attr: { value: 100, unit: 'millisecond', type: 'integer' },
             log_attr: { value: 'log_attr_3', type: 'string' },
           },
@@ -76,6 +78,7 @@ sentryTest('captures logs with scope attributes', async ({ getLocalTestUrl, page
             'sentry.sdk.version': { value: expect.any(String), type: 'string' },
             'sentry.timestamp.sequence': { value: expect.any(Number), type: 'integer' },
             global_scope_attr: { value: true, type: 'boolean' },
+            array_attr: { value: [1, 2, 3], type: 'array' },
             isolation_scope_1_attr: { value: 100, unit: 'millisecond', type: 'integer' },
             scope_attr: { value: 200, unit: 'millisecond', type: 'integer' },
             log_attr: { value: 'log_attr_4', type: 'string' },
@@ -92,6 +95,7 @@ sentryTest('captures logs with scope attributes', async ({ getLocalTestUrl, page
             'sentry.sdk.version': { value: expect.any(String), type: 'string' },
             'sentry.timestamp.sequence': { value: expect.any(Number), type: 'integer' },
             global_scope_attr: { value: true, type: 'boolean' },
+            array_attr: { value: [1, 2, 3], type: 'array' },
             isolation_scope_1_attr: { value: 100, unit: 'millisecond', type: 'integer' },
             scope_2_attr: { value: 300, unit: 'millisecond', type: 'integer' },
             log_attr: { value: 'log_attr_5', type: 'string' },

diff --git a/dev-packages/browser-integration-tests/suites/public-api/startSpan/streamed/test.ts b/dev-packages/browser-integration-tests/suites/public-api/startSpan/streamed/test.ts
@@ -4,6 +4,7 @@ import {
   SEMANTIC_ATTRIBUTE_SENTRY_OP,
   SEMANTIC_ATTRIBUTE_SENTRY_ORIGIN,
   SEMANTIC_ATTRIBUTE_SENTRY_SAMPLE_RATE,
+  SEMANTIC_ATTRIBUTE_SENTRY_SDK_INTEGRATIONS,
   SEMANTIC_ATTRIBUTE_SENTRY_SDK_NAME,
   SEMANTIC_ATTRIBUTE_SENTRY_SDK_VERSION,
   SEMANTIC_ATTRIBUTE_SENTRY_SEGMENT_ID,
@@ -207,6 +208,10 @@ sentryTest(
             type: 'string',
             value: SDK_VERSION,
           },
+          [SEMANTIC_ATTRIBUTE_SENTRY_SDK_INTEGRATIONS]: {
+            type: 'array',
+            value: expect.arrayContaining(['SpanStreaming']),
+          },
           [SEMANTIC_ATTRIBUTE_SENTRY_SEGMENT_ID]: {
             type: 'string',
             value: segmentSpanId,

diff --git a/...-integration-tests/suites/tracing/browserTracingIntegration/interactions-streamed/test.ts b/...-integration-tests/suites/tracing/browserTracingIntegration/interactions-streamed/test.ts
@@ -4,6 +4,7 @@ import {
   SEMANTIC_ATTRIBUTE_SENTRY_IDLE_SPAN_FINISH_REASON,
   SEMANTIC_ATTRIBUTE_SENTRY_OP,
   SEMANTIC_ATTRIBUTE_SENTRY_ORIGIN,
+  SEMANTIC_ATTRIBUTE_SENTRY_SDK_INTEGRATIONS,
   SEMANTIC_ATTRIBUTE_SENTRY_SDK_NAME,
   SEMANTIC_ATTRIBUTE_SENTRY_SDK_VERSION,
   SEMANTIC_ATTRIBUTE_SENTRY_SEGMENT_ID,
@@ -80,6 +81,10 @@ sentryTest('captures streamed interaction span tree. @firefox', async ({ browser
         type: 'string',
         value: SDK_VERSION,
       },
+      [SEMANTIC_ATTRIBUTE_SENTRY_SDK_INTEGRATIONS]: {
+        type: 'array',
+        value: expect.arrayContaining(['BrowserTracing', 'SpanStreaming']),
+      },
       [SEMANTIC_ATTRIBUTE_SENTRY_SEGMENT_ID]: {
         type: 'string',
         value: interactionSegmentSpan!.span_id,

diff --git a/...er-integration-tests/suites/tracing/browserTracingIntegration/navigation-streamed/test.ts b/...er-integration-tests/suites/tracing/browserTracingIntegration/navigation-streamed/test.ts
@@ -4,6 +4,7 @@ import {
   SEMANTIC_ATTRIBUTE_SENTRY_OP,
   SEMANTIC_ATTRIBUTE_SENTRY_ORIGIN,
   SEMANTIC_ATTRIBUTE_SENTRY_SAMPLE_RATE,
+  SEMANTIC_ATTRIBUTE_SENTRY_SDK_INTEGRATIONS,
   SEMANTIC_ATTRIBUTE_SENTRY_SOURCE,
 } from '@sentry/core';
 import { sentryTest } from '../../../../utils/fixtures';
@@ -131,6 +132,10 @@ sentryTest('starts a streamed navigation span on page navigation', async ({ brow
         type: 'string',
         value: SDK_VERSION,
       },
+      [SEMANTIC_ATTRIBUTE_SENTRY_SDK_INTEGRATIONS]: {
+        type: 'array',
+        value: expect.arrayContaining(['BrowserTracing', 'SpanStreaming']),
+      },
       'sentry.segment.id': {
         type: 'string',
         value: navigationSpan.span_id,

diff --git a/...wser-integration-tests/suites/tracing/browserTracingIntegration/pageload-streamed/test.ts b/...wser-integration-tests/suites/tracing/browserTracingIntegration/pageload-streamed/test.ts
@@ -4,6 +4,7 @@ import {
   SEMANTIC_ATTRIBUTE_SENTRY_OP,
   SEMANTIC_ATTRIBUTE_SENTRY_ORIGIN,
   SEMANTIC_ATTRIBUTE_SENTRY_SAMPLE_RATE,
+  SEMANTIC_ATTRIBUTE_SENTRY_SDK_INTEGRATIONS,
   SEMANTIC_ATTRIBUTE_SENTRY_SDK_NAME,
   SEMANTIC_ATTRIBUTE_SENTRY_SDK_VERSION,
   SEMANTIC_ATTRIBUTE_SENTRY_SEGMENT_ID,
@@ -138,6 +139,10 @@ sentryTest(
           type: 'string',
           value: SDK_VERSION,
         },
+        [SEMANTIC_ATTRIBUTE_SENTRY_SDK_INTEGRATIONS]: {
+          type: 'array',
+          value: expect.arrayContaining(['BrowserTracing', 'SpanStreaming']),
+        },
         [SEMANTIC_ATTRIBUTE_SENTRY_SEGMENT_ID]: {
           type: 'string',
           value: pageloadSpan?.span_id,

diff --git a/dev-packages/cloudflare-integration-tests/suites/public-api/startSpan-streamed/test.ts b/dev-packages/cloudflare-integration-tests/suites/public-api/startSpan-streamed/test.ts
@@ -2,13 +2,14 @@ import type { Envelope, SerializedStreamedSpanContainer } from '@sentry/core';
 import {
   SDK_VERSION,
   SEMANTIC_ATTRIBUTE_SENTRY_OP,
+  SEMANTIC_ATTRIBUTE_SENTRY_ORIGIN,
   SEMANTIC_ATTRIBUTE_SENTRY_RELEASE,
+  SEMANTIC_ATTRIBUTE_SENTRY_SAMPLE_RATE,
+  SEMANTIC_ATTRIBUTE_SENTRY_SDK_INTEGRATIONS,
   SEMANTIC_ATTRIBUTE_SENTRY_SDK_NAME,
   SEMANTIC_ATTRIBUTE_SENTRY_SDK_VERSION,
   SEMANTIC_ATTRIBUTE_SENTRY_SEGMENT_ID,
   SEMANTIC_ATTRIBUTE_SENTRY_SEGMENT_NAME,
-  SEMANTIC_ATTRIBUTE_SENTRY_ORIGIN,
-  SEMANTIC_ATTRIBUTE_SENTRY_SAMPLE_RATE,
   SEMANTIC_ATTRIBUTE_SENTRY_SOURCE,
 } from '@sentry/core';
 import { expect, it } from 'vitest';
@@ -175,6 +176,10 @@ it('sends a streamed span envelope with correct spans for a manually started spa
         attributes: {
           [SEMANTIC_ATTRIBUTE_SENTRY_SDK_NAME]: { type: 'string', value: CLOUDFLARE_SDK },
           [SEMANTIC_ATTRIBUTE_SENTRY_SDK_VERSION]: { type: 'string', value: SDK_VERSION },
+          [SEMANTIC_ATTRIBUTE_SENTRY_SDK_INTEGRATIONS]: {
+            type: 'array',
+            value: expect.arrayContaining(['SpanStreaming']),
+          },
           [SEMANTIC_ATTRIBUTE_SENTRY_RELEASE]: { type: 'string', value: '1.0.0' },
           [SEMANTIC_ATTRIBUTE_SENTRY_ORIGIN]: { type: 'string', value: 'auto.http.cloudflare' },
           [SEMANTIC_ATTRIBUTE_SENTRY_SEGMENT_ID]: { type: 'string', value: segmentSpanId },

diff --git a/dev-packages/e2e-tests/test-applications/deno-streamed/tests/spans.test.ts b/dev-packages/e2e-tests/test-applications/deno-streamed/tests/spans.test.ts
@@ -75,6 +75,10 @@ const SEGMENT_SPAN = {
       type: 'string',
       value: expect.any(String),
     },
+    'sentry.sdk.integrations': {
+      type: 'array',
+      value: expect.arrayContaining(['SpanStreaming']),
+    },
     'sentry.segment.id': {
       type: 'string',
       value: expect.stringMatching(/^[\da-f]{16}$/),

diff --git a/...ages/node-core-integration-tests/suites/public-api/startSpan/basic-usage-streamed/test.ts b/...ages/node-core-integration-tests/suites/public-api/startSpan/basic-usage-streamed/test.ts
@@ -3,6 +3,7 @@ import {
   SEMANTIC_ATTRIBUTE_SENTRY_OP,
   SEMANTIC_ATTRIBUTE_SENTRY_RELEASE,
   SEMANTIC_ATTRIBUTE_SENTRY_SAMPLE_RATE,
+  SEMANTIC_ATTRIBUTE_SENTRY_SDK_INTEGRATIONS,
   SEMANTIC_ATTRIBUTE_SENTRY_SDK_NAME,
   SEMANTIC_ATTRIBUTE_SENTRY_SDK_VERSION,
   SEMANTIC_ATTRIBUTE_SENTRY_SEGMENT_ID,
@@ -129,6 +130,10 @@ test('sends a streamed span envelope with correct spans for a manually started s
             [SEMANTIC_ATTRIBUTE_SENTRY_SAMPLE_RATE]: { type: 'integer', value: 1 },
             [SEMANTIC_ATTRIBUTE_SENTRY_SDK_NAME]: { type: 'string', value: 'sentry.javascript.node-core' },
             [SEMANTIC_ATTRIBUTE_SENTRY_SDK_VERSION]: { type: 'string', value: SDK_VERSION },
+            [SEMANTIC_ATTRIBUTE_SENTRY_SDK_INTEGRATIONS]: {
+              type: 'array',
+              value: expect.arrayContaining(['SpanStreaming']),
+            },
             [SEMANTIC_ATTRIBUTE_SENTRY_SEGMENT_ID]: { type: 'string', value: segmentSpanId },
             [SEMANTIC_ATTRIBUTE_SENTRY_SEGMENT_NAME]: { type: 'string', value: 'test-span' },
             [SEMANTIC_ATTRIBUTE_SENTRY_RELEASE]: { type: 'string', value: '1.0.0' },

diff --git a/dev-packages/node-integration-tests/suites/public-api/logger/scenario.ts b/dev-packages/node-integration-tests/suites/public-api/logger/scenario.ts
@@ -15,7 +15,6 @@ async function run(): Promise<void> {
 
   Sentry.getGlobalScope().setAttribute('global_scope_attr', true);
 
-  // this attribute will not be sent for now
   Sentry.getGlobalScope().setAttributes({ array_attr: [1, 2, 3] });
 
   // global scope, log attribute

diff --git a/dev-packages/node-integration-tests/suites/public-api/logger/test.ts b/dev-packages/node-integration-tests/suites/public-api/logger/test.ts
@@ -60,6 +60,7 @@ describe('logs', () => {
                 attributes: {
                   ...commonAttributes,
                   global_scope_attr: { value: true, type: 'boolean' },
+                  array_attr: { value: [1, 2, 3], type: 'array' },
                   log_attr: { value: 'log_attr_2', type: 'string' },
                 },
               },
@@ -72,6 +73,7 @@ describe('logs', () => {
                 attributes: {
                   ...commonAttributes,
                   global_scope_attr: { value: true, type: 'boolean' },
+                  array_attr: { value: [1, 2, 3], type: 'array' },
                   isolation_scope_1_attr: { value: 100, unit: 'millisecond', type: 'integer' },
                   log_attr: { value: 'log_attr_3', type: 'string' },
                 },
@@ -85,6 +87,7 @@ describe('logs', () => {
                 attributes: {
                   ...commonAttributes,
                   global_scope_attr: { value: true, type: 'boolean' },
+                  array_attr: { value: [1, 2, 3], type: 'array' },
                   isolation_scope_1_attr: { value: 100, unit: 'millisecond', type: 'integer' },
                   scope_attr: { value: 200, unit: 'millisecond', type: 'integer' },
                   log_attr: { value: 'log_attr_4', type: 'string' },
@@ -99,6 +102,7 @@ describe('logs', () => {
                 attributes: {
                   ...commonAttributes,
                   global_scope_attr: { value: true, type: 'boolean' },
+                  array_attr: { value: [1, 2, 3], type: 'array' },
                   isolation_scope_1_attr: { value: 100, unit: 'millisecond', type: 'integer' },
                   scope_2_attr: { value: 300, unit: 'millisecond', type: 'integer' },
                   log_attr: { value: 'log_attr_5', type: 'string' },

diff --git a/dev-packages/node-integration-tests/suites/public-api/startSpan/basic-usage-streamed/test.ts b/dev-packages/node-integration-tests/suites/public-api/startSpan/basic-usage-streamed/test.ts
@@ -3,6 +3,7 @@ import {
   SEMANTIC_ATTRIBUTE_SENTRY_OP,
   SEMANTIC_ATTRIBUTE_SENTRY_RELEASE,
   SEMANTIC_ATTRIBUTE_SENTRY_SAMPLE_RATE,
+  SEMANTIC_ATTRIBUTE_SENTRY_SDK_INTEGRATIONS,
   SEMANTIC_ATTRIBUTE_SENTRY_SDK_NAME,
   SEMANTIC_ATTRIBUTE_SENTRY_SDK_VERSION,
   SEMANTIC_ATTRIBUTE_SENTRY_SEGMENT_ID,
@@ -129,6 +130,10 @@ test('sends a streamed span envelope with correct spans for a manually started s
             [SEMANTIC_ATTRIBUTE_SENTRY_SAMPLE_RATE]: { type: 'integer', value: 1 },
             [SEMANTIC_ATTRIBUTE_SENTRY_SDK_NAME]: { type: 'string', value: 'sentry.javascript.node' },
             [SEMANTIC_ATTRIBUTE_SENTRY_SDK_VERSION]: { type: 'string', value: SDK_VERSION },
+            [SEMANTIC_ATTRIBUTE_SENTRY_SDK_INTEGRATIONS]: {
+              type: 'array',
+              value: expect.arrayContaining(['SpanStreaming']),
+            },
             [SEMANTIC_ATTRIBUTE_SENTRY_SEGMENT_ID]: { type: 'string', value: segmentSpanId },
             [SEMANTIC_ATTRIBUTE_SENTRY_SEGMENT_NAME]: { type: 'string', value: 'test-span' },
             [SEMANTIC_ATTRIBUTE_SENTRY_RELEASE]: { type: 'string', value: '1.0.0' },

diff --git a/packages/browser/test/integrations/spanstreaming.test.ts b/packages/browser/test/integrations/spanstreaming.test.ts
@@ -1,5 +1,5 @@
 import * as SentryCore from '@sentry/core';
-import { debug } from '@sentry/core';
+import { debug, SEMANTIC_ATTRIBUTE_SENTRY_SDK_INTEGRATIONS } from '@sentry/core';
 import { beforeEach, describe, expect, it, vi } from 'vitest';
 import { BrowserClient, spanStreamingIntegration } from '../../src';
 import { getDefaultBrowserClientOptions } from '../helper/browser-client-options';
@@ -145,6 +145,10 @@ describe('spanStreamingIntegration', () => {
           type: 'string',
           value: expect.any(String),
         },
+        [SEMANTIC_ATTRIBUTE_SENTRY_SDK_INTEGRATIONS]: {
+          type: 'array',
+          value: ['SpanStreaming'],
+        },
         'sentry.segment.id': {
           type: 'string',
           value: span.spanContext().spanId,

diff --git a/packages/core/src/attributes.ts b/packages/core/src/attributes.ts
@@ -15,10 +15,7 @@ type AttributeTypeMap = {
   integer: number;
   double: number;
   boolean: boolean;
-  'string[]': Array<string>;
-  'integer[]': Array<number>;
-  'double[]': Array<number>;
-  'boolean[]': Array<boolean>;
+  array: Array<string> | Array<number> | Array<boolean>;
 };
 
 /* Generates a type from the AttributeTypeMap like:
@@ -66,9 +63,9 @@ export function isAttributeObject(maybeObj: unknown): maybeObj is AttributeObjec
 /**
  * Converts an attribute value to a typed attribute value.
  *
- * For now, we intentionally only support primitive values and attribute objects with primitive values.
- * If @param useFallback is true, we stringify non-primitive values to a string attribute value. Otherwise
- * we return `undefined` for unsupported values.
+ * For now, we support primitive values and homogeneous arrays of primitives, either raw or
+ * inside attribute objects. If @param useFallback is true, we stringify other non-primitive values
+ * to a string attribute value. Otherwise we return `undefined` for unsupported values.
  *
  * @param value - The value of the passed attribute.
  * @param useFallback - If true, unsupported values will be stringified to a string attribute value.
@@ -170,17 +167,18 @@ function estimatePrimitiveSizeInBytes(value: Primitive): number {
 }
 
 /**
- * NOTE: We intentionally do not return anything for non-primitive values:
- *  - array support will come in the future but if we stringify arrays now,
- *    sending arrays (unstringified) later will be a subtle breaking change.
+ * NOTE: We return typed attributes for primitives and homogeneous arrays of primitives:
+ *  - Homogeneous primitive arrays ship with `type: 'array'` (Relay's wire tag for arrays).
+ *  - Mixed-type and nested arrays are not supported and return undefined.
  *  - Objects are not supported yet and product support is still TBD.
  *  - We still keep the type signature for TypedAttributeValue wider to avoid a
- *    breaking change once we add support for non-primitive values.
- *  - Once we go back to supporting arrays and stringifying all other values,
- *    we already implemented the serialization logic here:
- *    https://github.com/getsentry/sentry-javascript/pull/18165
+ *    breaking change once we add support for other non-primitive values.
  */
 function getTypedAttributeValue(value: unknown): TypedAttributeValue | void {
+  if (isHomogeneousPrimitiveArray(value)) {
+    return { value, type: 'array' };
+  }
+
   const primitiveType =
     typeof value === 'string'
       ? 'string'
@@ -201,3 +199,11 @@ function getTypedAttributeValue(value: unknown): TypedAttributeValue | void {
     return { value, type: primitiveType };
   }
 }
+
+function isHomogeneousPrimitiveArray(arr: unknown): arr is Array<string> | Array<number> | Array<boolean> {
+  if (!Array.isArray(arr)) return false;
+  if (arr.length === 0) return true;
+  const t = typeof arr[0];
+  if (t !== 'string' && t !== 'number' && t !== 'boolean') return false;
+  return arr.every(v => typeof v === t && (t !== 'number' || !Number.isNaN(v)));
+}
diff --git a/packages/core/src/semanticAttributes.ts b/packages/core/src/semanticAttributes.ts
@@ -52,6 +52,8 @@ export const SEMANTIC_ATTRIBUTE_SENTRY_SEGMENT_ID = 'sentry.segment.id';
 export const SEMANTIC_ATTRIBUTE_SENTRY_SDK_NAME = 'sentry.sdk.name';
 /** The version of the Sentry SDK */
 export const SEMANTIC_ATTRIBUTE_SENTRY_SDK_VERSION = 'sentry.sdk.version';
+/** The list of integrations enabled in the Sentry SDK (e.g., ["InboundFilters", "BrowserTracing"]) */
+export const SEMANTIC_ATTRIBUTE_SENTRY_SDK_INTEGRATIONS = 'sentry.sdk.integrations';
 
 /** The user ID (gated by sendDefaultPii) */
 export const SEMANTIC_ATTRIBUTE_USER_ID = 'user.id';

diff --git a/packages/core/src/tracing/spans/captureSpan.ts b/packages/core/src/tracing/spans/captureSpan.ts
@@ -6,6 +6,7 @@ import {
   SEMANTIC_ATTRIBUTE_SENTRY_ENVIRONMENT,
   SEMANTIC_ATTRIBUTE_SENTRY_OP,
   SEMANTIC_ATTRIBUTE_SENTRY_RELEASE,
+  SEMANTIC_ATTRIBUTE_SENTRY_SDK_INTEGRATIONS,
   SEMANTIC_ATTRIBUTE_SENTRY_SDK_NAME,
   SEMANTIC_ATTRIBUTE_SENTRY_SDK_VERSION,
   SEMANTIC_ATTRIBUTE_SENTRY_SEGMENT_ID,
@@ -63,6 +64,7 @@ export function captureSpan(span: Span, client: Client): SerializedStreamedSpanW
 
   if (spanJSON.is_segment) {
     applyScopeToSegmentSpan(spanJSON, finalScopeData);
+    applySdkMetadataToSegmentSpan(spanJSON, client);
     // Allow hook subscribers to mutate the segment span JSON
     // This also invokes the `processSegmentSpan` hook of all integrations
     client.emit('processSegmentSpan', spanJSON);
@@ -100,6 +102,15 @@ function applyScopeToSegmentSpan(_segmentSpanJSON: StreamedSpanJSON, _scopeData:
   // This will follow in a separate PR
 }
 
+function applySdkMetadataToSegmentSpan(segmentSpanJSON: StreamedSpanJSON, client: Client): void {
+  const integrationNames = client.getOptions().integrations.map(i => i.name);
+  if (!integrationNames.length) return;
+
+  safeSetSpanJSONAttributes(segmentSpanJSON, {
+    [SEMANTIC_ATTRIBUTE_SENTRY_SDK_INTEGRATIONS]: integrationNames,
+  });
+}
+
 function applyCommonSpanAttributes(
   spanJSON: StreamedSpanJSON,
   serializedSegmentSpan: StreamedSpanJSON,